Normally I just name the fish by looking at them, and a name pops up that I think suits them. I don't like colour based names. If I name it something in another language, it has to be one that i know. Otherwise it seems pointless ot me...no offence.
With the exception of Gloria (one of the forumers picked her name out), I named all of my fish this way. I might need help with my black guy too, I was thinking of Etoile or Roderick.